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Search For New Physics In Proton Proton Collision Events With A Lepton And Missing Transverse Energy
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Book Synopsis Search for New Physics in Proton-proton Collision Events with a Lepton and Missing Transverse Energy by : Mark Olschewski
Download or read book Search for New Physics in Proton-proton Collision Events with a Lepton and Missing Transverse Energy written by Mark Olschewski and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Multi-lepton Search for New Physics in 35pb−1 Proton-proton Collisions at the LHC for a Center of Mass Energy Of?s by : Dmitry Hits
Download or read book A Multi-lepton Search for New Physics in 35pb−1 Proton-proton Collisions at the LHC for a Center of Mass Energy Of?s written by Dmitry Hits and published by . This book was released on 2011 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes a model independent search for new physics with a decay signature of three or more leptons and missing transverse energy in 35pb−1 of proton-proton collisions at the LHC at a center mass energy?s = 7 TeV using the CMS detector. Standard Model backgrounds are predicted using both simulations and collision data. The observed events are consistent with the Standard Model predictions. The results are interpreted using various supersymmetric models: gravity mediated symmetry breaking, gauge mediated symmetry breaking with slepton co-NLSP, and leptonic R-parity violating.
Book Synopsis Search for New Physics in Same-sign Dilepton Events in Proton-proton Collisions at {u221A}s by :
Download or read book Search for New Physics in Same-sign Dilepton Events in Proton-proton Collisions at {u221A}s written by and published by . This book was released on 2016 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for new physics is performed using events with two isolated same-sign leptons, two or more jets, and missing transverse momentum. The results are based on a sample of proton-proton collisions at a center-of-mass energy of 13 TeV recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of 2.3 fb1. Multiple search regions are defined by classifying events in terms of missing transverse momentum, the scalar sum of jet transverse momenta, the transverse mass associated with a W boson candidate, the number of jets, the number of b quark jets, and the transverse momenta of the leptons in the event. The analysis is sensitive to a wide variety of possible signals beyond the standard model. No excess above the standard model background expectation is observed. Constraints are set on various supersymmetric models, with gluinos and bottom squarks excluded for masses up to 1300 and 680 GeV, respectively, at the 95% confidence level. Upper limits on the cross sections for the production of two top quark-antiquark pairs (119 fb) and two same-sign top quarks (1.7 pb) are also obtained. Furthermore, selection efficiencies and model independent limits are provided to allow further interpretations of the results.
Book Synopsis Search for New Physics in Proton-proton Collisions at 7 TeV in Events with a Single Lepton, Jets, and Missing Transverse Momentum by : Finn O'Neill Rebassoo
Download or read book Search for New Physics in Proton-proton Collisions at 7 TeV in Events with a Single Lepton, Jets, and Missing Transverse Momentum written by Finn O'Neill Rebassoo and published by . This book was released on 2011 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents results for a search for new physics based on 36 pb-1 of data taken during 2010 by the CMS experiment at the Large Hadron Collider (LHC). We specifically look at the signature with a single isolated lepton, jets, and large missing transverse momentum. To predict the standard model backgrounds in this search, two separate and complementary methods are employed, each of which use control samples in the data. The standard model background predictions are consistent with the observed number of events in both the muon and electron channels and for both background prediction methods. In addition, the observed missing transverse momentum distribution agrees well with the standard model prediction. In the absence of a signal we proceed to set limits in the contrained minimal supersymmetric extension of the standard model (CMSSM) parameter space.
Book Synopsis Search for Physics Beyond the Standard Model in Final States with a Lepton and Missing Transverse Energy in Proton-proton Collisions at $\sqrt{s}$ by :
Download or read book Search for Physics Beyond the Standard Model in Final States with a Lepton and Missing Transverse Energy in Proton-proton Collisions at $\sqrt{s}$ written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for new physics in proton-proton collisions having final states with an electron or muon and missing transverse energy is presented. The analysis uses data collected in 2012 with the CMS detector, at an LHC center-of-mass energy of 8 TeV, and corresponding to an integrated luminosity of 19.7 fb${̂-1}$. No significant deviation of the transverse mass distribution of the charged lepton-neutrino system from the standard model prediction is found. Mass exclusion limits of up to 3.28 TeV at a 95% confidence level for a W${̂\prime}$ boson with the same couplings as that of the standard model W boson are determined. Results are also derived in the framework of split universal extra dimensions, and exclusion limits on Kaluza-Klein W${̂(2)}_{{\rm KK}}$ states are found. The final state with large missing transverse energy also enables a search for dark matter production with a recoiling W boson, with limits set on the mass and the production cross section of potential candidates. Finally, limits are established for a model including interference between a left-handed W${̂\prime}$ boson and the standard model W boson, and for a compositeness model.
Book Synopsis A Search for New Physics in Photon-lepton Events in Proton-antiproton Collisions At[radical] S by :
Download or read book A Search for New Physics in Photon-lepton Events in Proton-antiproton Collisions At[radical] S written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the results of a search in p[bar p] collisions at[radical]s= 1.8 TeV for anomalous production of events containing a photon with large transverse energy and a lepton (e or[mu]) with large transverse energy, using 86 pb[sup -1] of data collected at the Collider Detector at Fermilab during the 1994-95 collider run at the Fermilab Tevatron. The presence of large missing transverse energy (E[sub T]), additional photons, or additional leptons in these events is also analyzed. The results are consistent with standard model expectations, with the possible exception of photon-lepton events with large E[sub T], for which the probability of a statistical fluctuation of the standard model expectation up to and above the observed level is 0.7%.
Book Synopsis A Search for New Physics in Events with Two Photons and Missing Transverse Energy in Proton-proton Collisions at Sqrt(s) by : David Michael Morse
Download or read book A Search for New Physics in Events with Two Photons and Missing Transverse Energy in Proton-proton Collisions at Sqrt(s) written by David Michael Morse and published by . This book was released on 2013 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Events with Large Missing Transverse Energy at the CERN Proton- Antiproton Collider by : Mohammad M. Mohammadi
Download or read book Events with Large Missing Transverse Energy at the CERN Proton- Antiproton Collider written by Mohammad M. Mohammadi and published by . This book was released on 1987 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Physics Beyond the Standard Model in Events with Two Leptons of Same Sign, Missing Transverse Momentum, and Jets in Proton-proton Collisions at √s by :
Download or read book Search for Physics Beyond the Standard Model in Events with Two Leptons of Same Sign, Missing Transverse Momentum, and Jets in Proton-proton Collisions at √s written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis New Aspects of High-Energy Proton-Proton Collisions by : A. Ali
Download or read book New Aspects of High-Energy Proton-Proton Collisions written by A. Ali and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: Articles focus on the planned European proton-proton collider, and concentrate on physics issues, rather than the more technical concerns addressed in the three previous workshops. The use of energies much higher than those of the American Superconducting Super Collider is featured. Topics include reviews of current projects, hadron collisions, lep
Book Synopsis Search for New Physics in Events with High Jet Multiplicity and Low Missing Transverse Momentum in Proton-proton Collisions at $\sqrt{s} by :
Download or read book Search for New Physics in Events with High Jet Multiplicity and Low Missing Transverse Momentum in Proton-proton Collisions at $\sqrt{s} written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A dedicated search is presented for new phenomena in inclusive eight- and ten-jet final states with low missing transverse momentum, with and without identification of jets originating from b quarks. The analysis is based on data from proton-proton collisions corresponding to an integrated luminosity of 19.6 inverse femtobarns collected with the CMS detector at the LHC at sqrt(s) = 8 TeV. The dominant multijet background expectations are obtained from low jet multiplicity control samples. Data agree well with the standard model background predictions, and limits are set in several benchmark models. Colorons (axigluons) with masses between 0.6 and 0.75 (up to 1.15) TeV are excluded at 95% confidence level. Similar exclusion limits for gluinos in R-parity violating supersymmetric scenarios are from 0.6 up to 1.1TeV. These results comprise the first experimental probe of the coloron and axigluon models in multijet final states.
Book Synopsis Phenomena Beyond the Standard Model: What Do We Expect for New Physics to Look Like? by : Roman Pasechnik
Download or read book Phenomena Beyond the Standard Model: What Do We Expect for New Physics to Look Like? written by Roman Pasechnik and published by Frontiers Media SA. This book was released on 2020-09-03 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
Book Synopsis Search for New Physics in Lepton + Photon + X Events with 305 Pb**-1 of P Anti-p Collisions at S**ư by :
Download or read book Search for New Physics in Lepton + Photon + X Events with 305 Pb**-1 of P Anti-p Collisions at S**ư written by and published by . This book was released on 2006 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present results of a search for anomalous production of events containing a charged lepton (l, either e or?) and a photon , both with high transverse momentum, accompanied by additional signatures, X, including missing transverse energy (E{sub T}) and additional leptons and photons. We use the same kinematic selection criteria as in a previous CDF search, but with a substantially larger data set, 305 pb−1, a p{bar p} collision energy of 1.96 TeV, and the upgraded CDF II detector. We find 42 l?E{sub T} events versus a standard model expectation of 37.3 ± 5.4 events. The level of excess observed in Run I, 16 events with an expectation of 7.6 ± 0.7 events (corresponding to a 2.7? effect), is not supported by the new data. In the signature of ll? + X we observe 31 events versus an expectation of 23.0 ± 2.7 events. In this sample we find no events with an extra photon or E{sub T} and so find no events like the one ee??E{sub T} event observed in Run I.
Book Synopsis Search for Supersymmetry in Hadronic Final States by : Hannsjörg Artur Weber
Download or read book Search for Supersymmetry in Hadronic Final States written by Hannsjörg Artur Weber and published by Springer. This book was released on 2015-06-11 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: The project reported here was a search for new super symmetric particles in proton-proton collisions at the LHC. It has produced some of the world’s best exclusion limits on such new particles. Furthermore, dedicated simulation studies and data analyses have also yielded essential input to the upgrade activities of the CMS collaboration, both for the Phase-1 pixel detector upgrade and for the R&D studies in pursuit of a Phase-2 end cap calorimeter upgrade.
Book Synopsis Search for New Physics in the Multijet and Missing Transverse Momentum Final State in Proton-proton Collisions at $\sqrt{s}$ by :
Download or read book Search for New Physics in the Multijet and Missing Transverse Momentum Final State in Proton-proton Collisions at $\sqrt{s}$ written by and published by . This book was released on 2014 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for new physics is performed in multijet events with large missing transverse momentum produced in proton-proton collisions at $\sqrt{s}$ = 8 TeV using a data sample corresponding to an integrated luminosity of 19.5 fb−1collected with the CMS detector at the LHC. The data sample is divided into three jet multiplicity categories (3-5, 6-7, and ≥8 jets), and studied further in bins of two variables: the scalar sum of jet transverse momenta and the missing transverse momentum. The observed numbers of events in various categories are consistent with backgrounds expected from standard model processes. Exclusion limits are presented for several simplified supersymmetric models of squark or gluino pair production.
Book Synopsis Search for New Physics in Final States with Low Transverse Energy Photon and Missing Transverse Energy in Proton-proton Collisions at $\sqrt{s} by :
Download or read book Search for New Physics in Final States with Low Transverse Energy Photon and Missing Transverse Energy in Proton-proton Collisions at $\sqrt{s} written by and published by . This book was released on 2015 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for new physics in the [gamma]+ET nal state is performed using pp collision data corresponding to an integrated luminosity of 7.3 fb-1 collected at √s = 8 TeV using low threshold triggers in a phase space region de ned by ET > 45 GeV and ET > 40 GeV.
Book Synopsis Proceedings of the XXV DAE-BRNS High Energy Physics (HEP) Symposium 2022, 12–16 December, Mohali, India by : Satyajit Jena
Download or read book Proceedings of the XXV DAE-BRNS High Energy Physics (HEP) Symposium 2022, 12–16 December, Mohali, India written by Satyajit Jena and published by Springer Nature. This book was released on with total page 1353 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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